scholarly journals Interpersonal competitiveness and improvement in reaction time in a visual search task

2015 ◽  
Vol 15 (12) ◽  
pp. 1370
Author(s):  
Carissa Romero ◽  
Kandace Markovich ◽  
Yvonne Johnson ◽  
Eriko Self
Keyword(s):  
Visual Search ◽  
Reaction Time ◽  
Search Task ◽  
Visual Search Task

The Impact of Age on Visual Search Performance

1993 ◽  
Vol 37 (2) ◽  
pp. 172-176 ◽  
Author(s):  
P. Manivannan ◽  
Sara Czaja ◽  
Colin Drury ◽  
Chi Ming Ip
Keyword(s):  
Visual Search ◽  
Reaction Time ◽  
Selective Attention ◽  
Search Task ◽  
Visual Search Task ◽  
Age Groups ◽  
Search Performance ◽  
Performance Effect ◽  
Age Related ◽  
The Impact

Visual search is an important component of many real world tasks such as industrial inspection and driving. Several studies have shown that age has an impact on visual search performance. In general older people demonstrate poorer performance on such tasks as compared to younger people. However, there is controversy regarding the source of the age-performance effect. The objective of this study was to examine the relationship between component abilities and visual search performance, in order to identify the locus of age-related performance differences. Six abilities including reaction time, working memory, selective attention and spatial localization were identified as important components of visual search performance. Thirty-two subjects ranging in age from 18 - 84 years, categorized in three different age groups (young, middle, and older) participated in the study. Their component abilities were measured and they performed a visual search task. The visual search task varied in complexity in terms of type of targets detected. Significant relationships were found between some of the component skills and search performance. Significant age effects were also observed. A model was developed using hierarchical multiple linear regression to explain the variance in search performance. Results indicated that reaction time, selective attention, and age were important predictors of search performance with reaction time and selective attention accounting for most of the variance.

scholarly journals Evidence of common and separate eye and hand accumulators underlying flexible eye-hand coordination

2017 ◽  
Vol 117 (1) ◽  
pp. 348-364 ◽  
Author(s):  
Sumitash Jana ◽  
Atul Gopal ◽  
Aditya Murthy
Keyword(s):  
Visual Search ◽  
Reaction Time ◽  
Search Task ◽  
Visual Search Task ◽  
Hand Movements ◽  
Drift Diffusion ◽  
Flexible Coupling ◽  
Hand Coordination ◽  
The Brain ◽  
Rt Distributions

Eye and hand movements are initiated by anatomically separate regions in the brain, and yet these movements can be flexibly coupled and decoupled, depending on the need. The computational architecture that enables this flexible coupling of independent effectors is not understood. Here, we studied the computational architecture that enables flexible eye-hand coordination using a drift diffusion framework, which predicts that the variability of the reaction time (RT) distribution scales with its mean. We show that a common stochastic accumulator to threshold, followed by a noisy effector-dependent delay, explains eye-hand RT distributions and their correlation in a visual search task that required decision-making, while an interactive eye and hand accumulator model did not. In contrast, in an eye-hand dual task, an interactive model better predicted the observed correlations and RT distributions than a common accumulator model. Notably, these two models could only be distinguished on the basis of the variability and not the means of the predicted RT distributions. Additionally, signatures of separate initiation signals were also observed in a small fraction of trials in the visual search task, implying that these distinct computational architectures were not a manifestation of the task design per se. Taken together, our results suggest two unique computational architectures for eye-hand coordination, with task context biasing the brain toward instantiating one of the two architectures.NEW & NOTEWORTHY Previous studies on eye-hand coordination have considered mainly the means of eye and hand reaction time (RT) distributions. Here, we leverage the approximately linear relationship between the mean and standard deviation of RT distributions, as predicted by the drift-diffusion model, to propose the existence of two distinct computational architectures underlying coordinated eye-hand movements. These architectures, for the first time, provide a computational basis for the flexible coupling between eye and hand movements.

Obsessive–compulsive disorder patients display enhanced latent inhibition on a visual search task

2006 ◽  
Vol 44 (8) ◽  
pp. 1137-1145 ◽  
Author(s):  
Oren Kaplan ◽  
Reuven Dar ◽  
Lirona Rosenthal ◽  
Haggai Hermesh ◽  
Mendel Fux ◽  
...  
Keyword(s):  
Visual Search ◽  
Obsessive Compulsive Disorder ◽  
Latent Inhibition ◽  
Search Task ◽  
Visual Search Task ◽  
Obsessive Compulsive ◽  
Compulsive Disorder

Effect of parietal lobe lesions on saccade targeting and spatial memory in a naturalistic visual search task

2003 ◽  
Vol 41 (10) ◽  
pp. 1365-1386 ◽  
Author(s):  
Steven S. Shimozaki ◽  
Mary M. Hayhoe ◽  
Gregory J. Zelinsky ◽  
Amy Weinstein ◽  
William H. Merigan ◽  
...  
Keyword(s):  
Visual Search ◽  
Spatial Memory ◽  
Search Task ◽  
Visual Search Task ◽  
Parietal Lobe
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